Friction and Wear of Carbon-Graphite Materials for High-Energy Brakes.

Abstract

Caliper-type brake simulation experiments were conducted on seven different carbon-graphite material formulations against a steel disk material and against a carbon-graphite disk material. The effects of binder level, boron carbide (B4C) additions, graphite fiber additions, and graphite cloth reinforcement on friction and wear behavior were investigated. Reductions in binder level and additions of B4C each resulted in increased wear. The wear rate was not affected by the addition of graphite fibers. Transition to severe wear and high friction was observed in the case of graphite-cloth-reinforced carbon sliding against a disk of similar composition. This transition was related to the disruption of a continuous graphite shear film that must form on the sliding surfaces if low wear is to occur. The exposure of the fiber structure of the cloth constituent is believed to play a role in the shear film disruption.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1975
Accession Number
ADA307037

Entities

People

  • Robert C. Bill

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Body Weight
  • Boron Carbides
  • Composite Materials
  • Electron Microscopy
  • Energy
  • Fiber Reinforced Composites
  • Friction
  • Graphitic Materials
  • Heat Transfer
  • High Energy
  • Materials
  • Measurement
  • Mechanical Properties
  • Surface Properties
  • Temperature Gradients
  • Turbulent Mixing

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials